The Donaldson P550639 is a high-quality spin-on lube filter designed for optimal engine oil filtration. Featuring advanced cellulose media, it efficiently captures contaminants, ensuring clean oil circulates to protect critical engine components and extend service life. This full-flow lube filter incorporates an anti-drain back valve to prevent dry starts and a bypass valve set at 1.7 bar (25 psi) to ensure continuous oil flow, even under cold start conditions or if the filter becomes restricted. With an outer diameter of 93 mm and a height of 175 mm, it is engineered for reliable performance in various heavy-duty applications.